The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 19, 1976
Filed:
Nov. 13, 1974
Applicant:
Inventors:
Kalman Toth, Budapest, HU;
Gyula Varju, Budapest, HU;
Assignee:
Szilikatipari Kozponti Kutato es Tervezo Intezet, Budapest, HU;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C03B / ;
U.S. Cl.
CPC ...
106 / ; 106D / ;
Abstract
The invention relates to expanded products made from riolite glasses with a natural water content of at least 4 % by weight, as well as to a process for the preparation of such products. When preparing these expanded products a granulometric fraction of 0.3 to 3.0 mm. of the natural riolite glass is subjected to a heat treatment at 220.degree. to 400.degree. C for at least one hour, to reach a residual water content of 1 to 4 % by weight, and the obtained partially dehydrated substance is expanded at 800.degree. to 1300.degree. C. This way expanded products with high quality can be obtained.